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0. BULLIVANT.

RIM CONTRACTOR AND EXPANDER. APPLICATION H.110 X2119: 1915.

1,306,997. PJIUFIITPdJllIlO 1?, 191%) 5 INVENTOR. Z 6&500 BaZZz aw I M ZTTORNEYS.

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Specification of Letters l'atent. Patented June, 1?, this.

application filed Gctober 19, 1916. Serial 1i 0. 126,561.

filed September 19, 1916, Serial No. 121,022.

In my former device it Was the object to difierentially act upon the split terminals to first separate. them, and tliereafizertelescope these terminals in order to reduce the diameter of the rim. I found. ii -practice that While the operation of removing and taking oil a tire was greatly facilitated by my former device, still, in many instances diflicnlty was encountered in expanding so as to return the split terminals into their initialahutting relation. While the resili ency of a will cause it to automatically expand, when released, to a hearly complete initial position, this resiliency cannot he re lied upon for completely and finally returning; the split ends into abutting relation.

It is the object of my present improved" device 'to not only difierentially act upon; the split terminals to first radially separate and then contract the same, but also, to subsequently dillerentially act upon the split terminals to expand the sarne into their normal abutting relationposition. In the most improved embodiment of my'devicc;

this dual function is performed by rodv mechanism to which tension is applied for contracting, and compression for expansion My invention has other features of novelty which will he more fully described in connection with the accompanying drawing" and which will be more particularly point/e out in the appended claims. In the dravvingz- Figure 1 1s a view in side elevation ofa jsplit rim showing the .applifcation thercto of the device cf-my invention. 1- lhg. 2 is a sectional viewcn line 2--2 of F1 1 showing the 139V1C8.01' a part thereof,

ad usted to contract the rim.

the following Fig. 3 is a view similar to Fig. 2 showing I the device actuated to expand the rim. to

Fig. i is an enlarged detail sectional view on line l of Fig. 1 Like characters of reference designate similar parts throughontthc dillerent fig'-' ures of the drawing. so My device is shown applied to a modern type of dcmonntahlerim having a Web or lease 1 and tire retaining flanges 2. In this type of rim the split terminals 3 and l are not severed on a scarfed or charnfered joint but are split square oil and'on a radial line so as to present fiat abutting ends 5 and 6., In this. form of rini, in order to contract the same, it is necessary to'first radially separate the endswhere the contracting 7% stress applied is substantially radial to the rim, as in the case of my present invention.

Referring more particularly to my improved device, 7 and 8 designate a pair of differential rim breaking and reducing or expanding rods having terminal ends 9 and 10 adapted for endwise abutting relation against the Web 1. Said rods are shown provided with pairs 01'' clips or hooks 11 and 12 adapted for engagement with the tire retaining flanges-2 ina manner more par-- ticularly shown in connection with an opposite pair of clips, presently to be described, and illustrated in F1g; 2. Pivot bolts 13 and 14% extend through the clips 11 and 12, and

the rods 7 and 8, respectively, to pivotally connect the clips 11 with the rod '3, and the clips 12 with rod 8. .Winged nuts 15 and v 16 may be applied to the pivot bolts to tightly grip the clips or hooks 10 and 118i? in frictional engagement With thefianges 2. to prevent slippage of the parts. 1 10 97? ever, while this tight adjustment is advantageous, is not alisolutely essential to 5 ellicientoperation. 1 ,will be noted that .95 the hooks'll and 12 are-disposed at points on. opposite sides bfthe'split terminals of the rim. Rod/ills shorter than, rod-8 and l have shown these rods pivotally connected by a pivot T1: lyikewisa the, distance beme pileoiil'l' andthe extremities of hooks '11 i's' jless than the distance between pivot 17 'lindthe extremities of hooks 12.

New therefore it will he 'seen that if'ten "sion or pulling stressvVaahPPlied to rods 7 and 8 radially inwardly, of the rim; by

means of the'pivot 17, the terminal 3 would first bedrawn insideof terminal 4 and. then the two terminals would be telescop'd 5 shown 1n Fig. i l}, Likewise, if compressi or pushin stress. were exerted radially out:

ferentially. a

,1 other end of the turn buckle an minal end 22 of the clip bolt is adapted for ,An actuating rod device is pivotally corinected with the diflerentjial rod devices. 1

As shown, said actuating device'inclu'des a pivot bolt 18 which is connected with rods 7 and 8' bypivot bolt 17, a winged nut 1?;

serving to tighten the connection 'whende sired. Bolt 18 is threaded for engagement with a turnbuckle 20, at one end of the ;l-atter-. A threaded clip bolt 21 engages the the tee engagement with web 1 to act in opposition to rod ends 9 and 10 in order to expand the rim when the turn buckle '20 is rotated in one direction. A pair of clips or hooks 23 is' pivoted by a pivot bolt 24 to a reduced portion 25, of bolt 21. A winged nut 26 serves to adjust the hooks 23 tightly against the ri-mi when desired. The clips or hooks 11 and 12 are inall respects similar to *the hooks 23; It is preferable toapply thedevice in a manner similar to the application shown in Fig. 1 so that the longitudinal axis of-the actuating rod device will not be in device to break at alinementwith rod 7, but will be s'li htly to the left of rod '7, as indicated at a. v hus ivot 17 will dead center with'respect to rod and prevent buckling of the device laterally to the right of Fig. 1 under compres sion or expanding stress applied to therods. However, the clips 12 would not permit the pivot 17 after certain. play had been taken up. It will now be clear that by turning the nut 20 in one direction, the rim will be contracted. Under tension. stress illustrated, there will be a certain. amount of play or space between-the rod ends and the rim web, as shown in Fig. 2. When the nut 20; 1s

turned 'to expand the rim, the first few turns will merely releasethe rim for expansion under its own inherent resiliency. After this resiliency is exhausted, then further turning of the nut 20 will bring the rod ends into engagement with the rims web 1,

as shown in Fig.- 3, and from that pointon, the rods will be under compression and will be forced radially outwardly until the ends 5 and 6 have been sna p'ed into position.

It is believed that he novelty and utility of my invention will be fully understood from theforegoing description, and while I have herein shown anddescribed one specific as the claims may import.

p I claim:

V 1. In a device for contracting and then expanding a'splitfldemountablemim, a pair of rim breaking rod'devices engagea'ble radially inwardly and outwardly 'of the rim points on opposite sides of the split poi t1on thereof, a turn buckle rod device en- 'gageable radially inwardly and outwardly of the rim substantially diametrically op'po- .site the split. port ion thereofijsaid turn buckle rod device being pivotally' connected with saidrod breaking devices and one of said rodbreaking' devices being: longer than the other, whereby actuation of. the turn ,buckle device in one direction "will draw said rod devices radiallydnwardly of the rim to first-separate the ends and then-tele' scope the rim ends rind reduce the diameter" of the rim, or, upon actuation of "the turn buckle device'in an opposite direction fogrc j stantially diametrically opposite the split.

portion thereof, terminal sets of grips for engagement with opposite margins of each ing said' rod devices outwardly radially off the rim to expand the latter to a normal po-' split terminal of said rim, a contracting and expanding mechanism having a rod piv-v otally connected with said single set of grips and extendingbetweenfsaid grips and to ward and for engagement with the inner face ofsaid rim, a differential rod of relativelylong length .pivoted to said mechanism:

at its inner'end and its outer end extending between and being pivoted to one set of sai terminal grips and the terminal end ,of said- I longer rod extending beyond the point ofv pivotal connection with its terminal grips toward and for engagement with: the inner face of said rim, and a relatively short dif ferential-rod pivoted to said mechanism at its inner end on an axis co-incident with the plvotal connection of the longer rod to sand mechanism and the outer-end of said shorter rod extending between and being pivoted to a the remaining set of terminal grips and the terminal end of said shorter rod,extending beyond its point of pivotal connection with lts set of terminal grips toward and for engagement with the inner face of said rim, P

whereby contraction of said mechanism will impose tension on said rods andtheir grips to diii'erentially operate 'on said split terminals to first radially separate and then circumferentially telescope the same, and whereby expansion of said mechanism will impose compression stress on said rods to engage the terminal ends thereof with. the

inner face of said rim to first telescopically expand said split terminals and then force the ends of said terminals into abutting relation, the clearance between the terminal ends ofsaid 'rods and the inner face of sald rim being sufficiently reduced to prevent disconnection of said clips from the flange mar' tion and removal of a casing on and oil a split rim, a turn buckle bodyfa threaded bolt for engagement with one end of said body and havi g an end for expansive engagement with the inner face of said rim sub stantially diametrically opposite the split portion thereof, clip means connected with said bolt for contractively engaging .said rim, a second threaded bolt for the remaining end of said turn buckle body, a relatively long differential rod pivoted to said second bolt and havingan endfor expansive face of one split .termmal of said rim, a relatively short engagement with the inner d f 1 ferential rod pivoted to said second bolt and having an end for expansive engagement with the inner face of the remaining terminal'of said rim, terminal clip means for each rod for contractive engagement with the terminal ends of said rim, whereby rotative adjustment of said turn buckle body in one direction will differentially operate on said split terminals to first radially separate and then telescopically contract said terminals, and rotative adjustment of said'buckle body in another direction will first differentially expand said rim terminals and then force the innermost terminal into abutting relation with the outermost terminal.

In'testimony that I claim the foregoing as my own, I hereby aiiix my signature.

' OISCQ BULLIVANT. 

